170 
Journal of Agricultural Research 
Vol. XXI, No. 2 
The totals for the foregoing tests with chenopodium or its constituents, 
so far as totals may be compiled, show that it removed 60 hookworms 
and left 234, an efficacy of 20 per cent. 
CHLOROFORM AND CHENOPODIUM 
Hall and Foster (9) found that chenopodium in doses of 0.1 m. p. k. 
and chloroform in doses of 1 minim per kilogram, given to 6 dogs 
daily for 6 successive days, removed 94 hookworms and left 39, an effi¬ 
cacy of 71 percent; chenopodium and chloroform, at the rate of o. 1 
m. p. k. each, given to 4 dogs in 1 dose removed 7 hookworms and left 
54, an efficacy of 11 per cent; chenopodium and chloroform, at the rate 
of 0.2 m. p. k. each, was over 50 per cent effective against hookworms. 
Hall (8, pt. IV) found that chenopodium at the rate of 0.1 m. p. k. and 
chloroform at the rate of 0.2 m. p. k., given to 15 dogs, removed 35 hook¬ 
worms and left 4, an efficacy of 87.5 per cent; chenopodium at the rate 
of 0.05 m. p. k. and chloroform at the rate of 0.2 m. p. k., given to 3 dogs, 
removed 8 hookworms and left 2, an efficacy of 80 per cent; chenopodium 
and chloroform at the rate of 0.2 m. p. k. each, given to 4 dogs, removed 
no hookworms and left 1, an efficacy of o per cent; the totals for the 
cases in this paper in which single doses were used being 43 hookworms 
removed and 8 left, an efficacy of 84 per cent. In repeated doses, 
chenopodium in soft capsules, in 5- to 10-minim doses (at i-hour inter¬ 
vals; not stated in paper) for 3 doses, each dose accompanied by X ounce 
of castor oil, followed by 4 mils of chloroform in X ounce of castor oil, 
given to 4 dogs, removed 127 hookworms and left 15, an efficacy of 89 
per cent; chenopodium and chloroform in soft capsules, each containing 
5 minims of chenopodium and 10 minims of chloroform, were given to 
4 dogs in amounts of 1, 2, or 4 capsules and removed 8 hookworms and 
left 11, an efficacy of 42 per cent; these same capsules were given at the 
rate of 1 daily to 11 dogs, for 2, 3, 5, 6, and 7 days, and removed 45 
hookworms and left 19, an efficacy of 70 per cent; the totals for the cases 
in this paper in which repeated doses were used were 180 hookworms 
removed and 45 left, an efficacy of 80 per cent. 
Hall (8, pt. VI) found that enteric-coated capsules containing 5 
minims of chenopodium and 10 minims of chloroform, given in a dose of 
2 to 3 capsules, removed no hookworms and left 2, an efficacy of o 
per cent. 
The totals for the foregoing tests of chenopodium plus chloroform, so 
far as totals may be compiled, show that it removed 324 hookworms 
and left 147, an efficacy of 69 per cent. 
THYMOL 
Hall and Foster (9) found that thymol in doses of 298 to 1,752 mgm., 
given to 9 dogs, removed 23 hookworms and left 128, an efficacy of 15 
per cent. 
